Proceedings of the National Academy of Sciences of the United States of America

Description:

PNAS is the world's most-cited multidisciplinary scientific serial.
It publishes high-impact research reports, commentaries, perspectives, reviews,
colloquium papers, and actions of the Academy. In accordance with the guiding
principles established by George Ellery Hale in 1914, PNAS publishes
brief first announcements of Academy Members' and Foreign Associates' more
important contributions to research and of work that appears to a Member to
be of particular importance.

The "moving wall" represents the time period between the last issue
available in JSTOR and the most recently published issue of a journal.
Moving walls are generally represented in years. In rare instances, a
publisher has elected to have a "zero" moving wall, so their current
issues are available in JSTOR shortly after publication.
Note: In calculating the moving wall, the current year is not counted.
For example, if the current year is 2008 and a journal has a 5 year
moving wall, articles from the year 2002 are available.

Terms Related to the Moving Wall

Fixed walls: Journals with no new volumes being added to the archive.

Absorbed: Journals that are combined with another title.

Complete: Journals that are no longer published or that have been
combined with another title.